Vending machine



FIG. 1 is a front perspective view of a vending machine showing my new design;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is a left side perspective view thereof;

FIG. 4 is a rear perspective view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a vending machine, as shown. 